S: (n) Puccinia, genus Puccinia (type genus of the Pucciniaceae; a large genus of parasitic fungi including many that are destructive to various economic plants)

S: (n) Gymnosporangium, genus Gymnosporangium (genus of fungi that produce galls on cedars and other conifers of genera Juniperus and Libocedrus and causes rust spots on apples and pears and other plants of family Rosaceae)

S: (n) flag smut fungus (a smut fungus causing a smut in cereals and other grasses that chiefly affects leaves and stems and is characterized chains of sori within the plant tissue that later rupture releasing black masses of spores)